<template>
  <div>
    <!-- 面包屑 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片区域 -->
    <el-card class="box-card">
      <el-row>
        <el-col>
          <el-button type="primary"> 添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表 -->
      <el-table :data="rolelist" border stripe="">
        <!-- 展开行 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row
              :class="['bdtop', i1 === 0 ? 'bdtop' : '', 'vcenter']"
              v-for="(item1, i1) in scope.row.children"
              :key="item1.id"
            >
              <!-- 渲染一级权限 -->
              <el-col :span="5">
                <el-tag  closable
                      @close="removeRightById(scope.row,item1.id)">{{ item1.authName }}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级和三级权限 -->
              <el-col :span="19">
                <el-row
                  :class="[i2 === 0 ? '' : 'bdtop', 'vcenter']"
                  v-for="(item2, i2) in item1.children"
                  :key="item2.id"
                >
                  <el-col :span="6">
                    <el-tag  closable
                      @close="removeRightById(scope.row,item2.id)" type="success">{{ item2.authName }}</el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级权限 -->
                  <el-col :span="18">
                    <el-tag
                      type="warning"
                      v-for="(item3, i3) in item1.children"
                      :key="item3.id"
                      closable
                      @close="removeRightById(scope.row,item3.id)"
                      >{{ item3.authName }}</el-tag
                    >
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
          </template>
        </el-table-column>

        <el-table-column type="index" label="#"></el-table-column>
        <el-table-column label="角色名称" prop="roleName"></el-table-column>
        <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
        <el-table-column label="操作" width="300px">
          <template slot-scope="scope">
            <el-button size="mini" type="primary" icon="el-icon-edit"
              >编辑</el-button
            >
            <el-button size="mini" type="danger" icon="el-icon-delete"
              >删除</el-button
            >
            <el-button size="mini" type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)"
              >分配权限</el-button
            >
          </template>
        </el-table-column>
      </el-table>
    </el-card>

    <!-- 分配权限的对话框 -->
    <el-dialog
  title="分配权限"
  :visible.sync="setRightDialogVisible"
  width="50%" @close="setRightDialogClosed">
  <!-- 树形控件 -->
  <el-tree :data="rightlist" :props="treeProps" show-checkbox
  node-key="id" default-expand-all  :default-checked-keys="defkeys" ref="treeRef"></el-tree>
  <span slot="footer" class="dialog-footer">
    <el-button @click="setRightDialogVisible = false">取 消</el-button>
    <el-button type="primary" @click="allotRights">确 定</el-button>
  </span>
</el-dialog>

  </div>
</template>
<script>
export default {
  // name:"roles",
  data() {
    return {
      // 所有角色列表数据
      rolelist: [],
    //   所有权限的数据
      rightlist:[],
    //   控制分配权限的显示和 隐藏
      setRightDialogVisible:false,
    //   树形控件
    treeProps:{
        label:'authName',
        children:'children'
    },
    // 默认选中的节点id 的数组
    defkeys:[],
    // 当前分配角色的id
    roleId:''

    };
  },
  methods: {
    // 获取所有角色的列表
    async getRolesList() {
      const { data: res } = await this.$http.get("roles");
      if (res.meta.status !== 200) {
        return this.$message.error("获取角色失败");
      }
      this.rolelist = res.data;
    },
    // 删除用户权限
   async removeRightById (role,rightId){
        //弹框提示用户是否要删除 
     const confirmResult =await  this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err=>err)
        if(confirmResult !=='confirm'){
            return this.$message.info('取消了删除')
        }
        // console.log('确认了删除');
        const { data:res} = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)

        if(res.meta.status !==200){
            return this.$message.error('删除权限失败')
        }
        this.$message.success('删除权限成功')
        role.children=res.data
    },
    //点击分配权限 
   async showSetRightDialog(role){
    //    获取分配权限的id
       this.roleId=role.id
    //    获取所有权限的数据
    const { data:res}=await this.$http.get('rights/tree')
    if(res.meta.status !==200){
        return this.$message.error('获取权限失败')
        // ba把获取到的数据保存到data中
    }
        this.rightlist=res.data
        // 递归获取三级节点的id
        this.getLeafkeys(role,this.defkeys)

        this.setRightDialogVisible=true
    },
    // 通过递归的形式 获取角色下所有三级权限的id  并保存到defkeys数组中
    getLeafkeys(node,arr){
        // node 被递归的对象
        // arr 保存三级权限的数组
        // 如果当前的node 节点不包含children属性 则是三级节点
        if(!node.children){
            return arr.push(node.id)
        }
        node.children.forEach(item=>this.getLeafkeys(item,arr))
    },
    // 监听分配权限对话框的关闭事件
    setRightDialogClosed(){
        // 当对话框发生变化的时候 重新给defkeys赋值
        this.defkeys=[]
    },
    // 点击确定按钮为角色分配权限
   async allotRights(){
       const keys=[
           ...this.$refs.treeRef.getCheckedKeys(),
           ...this.$refs.treeRef.getHalfCheckedKeys()

       ]
       const idStr=keys.join(',')
       const {data:res} =await this.$http.post(`roles/${this.roleId}/rights`,{ rids:idStr})
       if(res.meta.status !==200){
           return this.$message.error('分配权限失败')
       }
    //    提示成功的消息
       this.$message.success('分配权限成功')
    //    刷新列表
       this.getRolesList();
    //    关闭对话框
       this.setRightDialogVisible=false
    }
  },
  created() {
    this.getRolesList();
  },
};
</script>

<style lang="less" scoped>
.el-tag {
  margin: 7px;
}
// 样式
.bdtop {
  border-top: 1px solid #eee;
}
.bdbottom {
  border-bottom: 1px solid #eee;
}
.vcenter {
  display: flex;
  align-items: center;
}
</style> 